Firebase Hosting Custom Domain - site not "Go Live" after update DNS records by "CNAME records" method

My domain verification process is completed and i also update my domain's DNS records to point to Firebase using "CNAME records" method (updated before approx 96 hours) but my site was not "Go Live". In Firebase console Hosting menu that give me below message:

Your site will go live when your domain registrar propagates your updated records.

I have already deploy my site default index.html using "Firebase deploy" CLI command and it's already successfully uploaded on "mydomainname.firebaseapp.com"

My Question: why my custom domain is not redirect to Firebase hosting?

Note: I have set default GoDaddy DNS nameservers in my domain.

I had the same problem and here is how i resolved it :

I put three parameters in the DNS record :

1. CNAME with www
2. A with 1st IP
3. A with 2nd IP

and then i only add two nameservers i.e.: ns1 & ns2 out of the 4 default Nameservers provided by name.com

and now my website is live on firebase.

-extra info:

it was not going live when i was using the 4 default nameservers. it was not working with only one CNAME or both CNAME, or only both A with IP

I even contacted support on name.com they answered it is essential to have NameServer.